Mathematics Numbers

Mathematics Numbers

Q-1 Which prime of the following is smallest even Prime number?
(a) 4 (b) 2 (c) 8 (d) 10

Q-2 HCF of 7/4, 21/4, 28/12 is
(a) 7/100 (b) 7/24 (c) 7/25 (d) None

Q-3 LCM of 12/9, 24/18, 36/27 is
(a) 7 (b) 8 (c) 11 (d) None

Q-4 x/y=2/5, y/z = 8 , find x/z=?
(a) 4/24 (b) 4/25 (c) 4/58 (d) None

Q-5 12/13x-41/26x=11, find x
(a) 26× 11/17 (b) 26 ×12/9 (c) 26× 18/11 (d) None

Q-6 How many prime no. are there between 10 to 30?
(a) 7 (b) 6 (c) 8 (d) 9

Q-7 1/ (n-n)! =?
(a) 2 (b) 1 (c) 3 (d) 5

Q-8 If Manoj’s age 5 years ago was 23 years, then what will be its present age?
(a) 25 (b) 18 (c) 19 (d) 28

Q-9  25% of 50 of 3/35 %of 25 of 4=?
(a) 14/11 (b) 15/14 (c) 19/13 (d) None

Q-10  5 x +7/7x +8 = 9/11, find x
(a) 5/6 (b) 5/11 (c) 5/8 (d) None

Q-11 1+2+3+4+ --------- 12 = ?
(a) 72 (b) 78 (c) 79 (d) 80

Q-12 10 +11+12+ ---------- 15= ?
(a) 175 (b) 75 (c) 68 (d) None

Q-13 (2n) 2 -(2n+2)2 is always divisible by which value?
(a) 5 (b) n (c) 6 (d) None

Q-14 X2 + 11x+30 =0 find the value of x
(a) - 5, -6 (b) 5, 6 (c) 15/9 (d) None

Q-15 Find the digit at unit place of 313× 41× 152 ×161
(a) 3 (b) 6 (c) 4 (d) 5

Q-16 Find the value of x in 53x4, if it is divisible by4
(a) 4 (b) 3 (c) 5 (d) 7

Q-17 If x +y = 11 and x2+y2=12, find the value of x y
(a) 67 (b) 66 (c) 68 (d) 29

Q-18 Find H.C.F of 34 × 46× 78, 33× 47× 79
(a) 34 × 46 ×78 (b) 34 × 46 (c) A&B (d) None

Q-19 99× 99 × 99
(a) 1000 300 - 30001 (b) 100001 (c) 1001 (d) None

Q-20 Find the number which have large of divisor?
(a) 11 (b) 17 (c) 21 (d) 29

Q-21 (X/13) (X/13) = 4, find x
(a) 27 (b) 26 (c) 28 (d) None

Q-22 ( 703 + 503)/ (70)2 + 502 - (70) (50)
(a) 130 (b) 120 (c) 180 (d) None

Q-23 If 10 year after the age of Nirmal is 38 year then presently her age will be
(a) 28 (b) 38 (c) 48 (d) None

Q-24 Find LCM of 2, 8, 16, 32
(a) 16 (b) 32 (c) 2 (d) 8

Q-25 H.C.F of (4, 16, 32)
(a) 8 (b) 4 (c) 8 (d) None

ANSWERS:-

1 (b) 2
2 (b) 7/24
3 (b) 8
4 (b) 4/25
5 (a) 26× 11/17
6 (b) 6
7 (b) 1
8 (d) 28
9 (b) 15/14
10 (c) 5/8
11 (b) 78
12 (b) 75
13 (b) n
14 (a) - 5, -6
15 (b) 6
16 (a) 4
17 (b) 66
18 (a) 34 × 46 ×78
19 (a) 1000 300 - 30001
20 (c) 21
21 (b) 26
22 (b) 120
23 (a) 28
24 (b) 32
25 (b) 4

REASONS:-

2 (b) HCF=HCF of 7,21,28/LCM of 4,8,12=7/24
3 (b) LCM= LCM12,24,36/1CF 9,18,27
= 72/9 = 8
4 (b) x/y × y/2 = x/2
=2/5×4/18 =4/45
5 (a) (24 -41) x /26 =11
= 17/26x=11
x=11×26/17
6 (b) 11, 13, 17,19,23,29
7 (b) 1/01
=1=1/1=1
9 (b) 25/100×50×3/35/100×25×4
= 150/35×4
=150/140=15/14
10 (c) 11(5x+7) =9(7x+8)
=55x+77 = 63x+72
= 5 = 8x
5/8 =x
11 (b) 1+2+3----------- +12
= 12(12+1)/2
= 12(13)/2 =78
12 (b) (1+ 2+3+--------+9) + (10+-------- +15) -(1+2+-------+9)
= å 15-åa