Thursday, October 9, 2014

7th maths competitive maths

1.A person climbs up a pole of 88 mt high, in every minute he climbs 12 mt but slips down 8 mt. So how much time he will take to reach at the top?
(a) 19                                                               (b) 29
(c) 28                                                               (d) 22

2.How many square of side 5 cm cab ve adjusted in a rectangular box of size 25 15 10 cm
(a) 30                                                                 (b) 60
(c) 50                                                                 (d) 40
3.The sum of 3 positive numbers in AP is 189. The sum of their squares is 11915. Find their
product.
(a) 7930                                                                            (b) 8970
(c) 9703                                                                            (d) 7960
4.Find the number whose square root is twice of its cubic root.
(a) 128                                                                (b) 64
(c) 16                                                                  (d) 4
5.There are 24 birds on a tree. A hunter fired a gun and 20 fall down on ground. So how many birds left on the tree?
(a) 4                                                                 (b) 7
(c) 24                                                               (d) None of these
6.A is four times as efficient as B & A can complete a work in 90 days less time than B. Find in how many days both can complete the work.
(a) 30                                                               (b) 20
(c) 40                                                               (d) 50
7. I am the eldest child of my parents. There is a gap of 6 years between the ages of my brotherand sister including myself. If my mother was 22 years, when I was born? What was age at the birth of her youngest child?
(a) 30                                                               (b) 28
(c) 16                                                               (d) 25
8.The calendar of the year 1982 can next be used for the year?
(a) 1984                                                                         (b) 1990
(c) 1985                                                           (d) 1988
9.Two successive discount of 20% and 25% equivalent to what amount of a single discount?
(a) 25%                                                                        (b) 20%
(c) 15%                                                                          (d) 5%


10. 243 has been divided into three parts such that half of the first part, one-third of the second part and one-fourth of the third part are equal.  The largest part is

            (a)        108                              (b)       86
            (c)        92                                (d)       74

11.If x persons can complete work in t hours, in how many hours y persons can complete it?
(a) x/yt                                                             (b) tx/y
(c) y/tr                                                              (d) y/tx

12.Mohan spent 25% of his monthly earning on magazines. Out of the banana amount he spent 75% on the hostel and college fees. If he had Rs. 120 at the end of the month, find how much money he has received from his father in that month?
(a) Rs. 1000                                                    (b) Rs. 1260
(c) Rs. 640                                                      (d) Rs. 850

13.A, B and C are partners and invests in a business such that A spends 1/4th of the total. B spends 1/5th less than C. If C’s investment is 1/3, find the ratio of their profits on a amount of 4300.
(a) 15:20:8                                                      (b) 20:15:8
(c) 8:15:20                                                      (d) 25:5:8

14. In a cage, there are rabbits and parrots and the number of heads are 28 and feet are 72. Find the number of parrots and rabbits.
(a) 20, 8                                                                          (b) 8, 20
(c) 14, 14                                                         (d) 12, 16

15.Some students are divided into two groups A & B. If 10 students are sent from A to B, the number in each is the same. But if 20 students are sent from B to A, the number in A is double the number in B. Find the number of students in each group A & B.
(a) 100, 80                                                       (b) 80, 100
(c) 110, 70                                                                  (d) 70, 110
16. The area of a rectangular park is 527 m2. If its length is 31 m, then its perimeter is
            (A) 17 m                                                           (B) 48 m
            (C) 96 m                                                           (D) 56 m
17. The ratio between two numbers is 3 : 4 and their sum is 84. The difference between
      the numbers is
            (A) 1                                                                  (B) 7
            (C) 12                                                                (D) 16
18. The value of x which satisfies the equation 2x +5 = 27 is
(A) 2                                                                 (B) 3          
             (C) 5                                                                  (D) 11
19. The sum of exterior angles of a triangle is -----
          (A) 900                                                                 (B) 1800
          (C) 2700                                                                (D) 3600
20. If the sum of four times of number and 12 is 20, then  the number is
(A) 5                                                      (B) 2             
(C) 3                                                        (D) 4
21.A runs faster than E but not so fast as B and B runs faster than C but not as faster than D, who runs faster?
(a) A                                                                (b) B
(c) C                                                                (d) E

22.       93 + 3 – 7 ÷ 43 x 29 = ?

            (a)        103                              (b)       203
            (c)        302                              (d)       197

23.       213 ÷ 711 x 322 + 23 – 9 = ?

            (a)        327                              (b)       -327
            (c)        -372                             (d)       1050

24.       1.8 x 7 + 5 – 14 ÷ 1.5 + 3 = ?

            (a)        20.9                             (b)       19.9
            (c)        18.9                             (d)       None of these

25.       121 ÷ 517 + 47 – 17 ÷ 17 x 41 = ?

            (a)        42                                (b)       32
            (c)        -43                               (d)       None of these

26.       2 – 7 ÷ 3 + 4 – 2 x 19 ÷ 12 = ?

            (a)        -19.5                            (b)       -18.5
            (c)        19.5                             (d)       18.5

27.        = ?

            (a)                            (b)       (x-5y-7z-1)1/3
            (c)        (x5y7z-1)1/3                    (d)       None of these




28.                 1
            ______________        = ?
                          8
            3 + __________
                            3
                  4 + ______           
                            1
                          5 + ___
                                 4

            (a)        5/21                             (b)       4/19
            (c)        5/19                             (d)       4/21


29.        ?

            (a)        5.1                               (b)       1.1
            (c)        -2.25                            (d)       -5.1

30.       If  = 12, then the value of x is

            (a)        1/2                               (b)       3/8
            (c)        -1/2                              (d)       -1/4


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