90
Q:

# The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

 A) 74 B) 94 C) 184 D) 364

Explanation:

L.C.M. of 6, 9, 15 and 18 is 90.

Let required number be 90k + 4, which is multiple of 7.

Least value of k for which (90k + 4) is divisible by 7 is k = 4.

=>Required number = (90 x 4) + 4   = 364.

Q:

Consider a two-digit number. The difference between the number and the number we get when its digits are reversed is 27. If the sum of the digits in the given number is 9, find the HCF of the number and the number when its digits are reversed.

 A) 6 B) 4 C) 9 D) 5

Explanation:

3 147
Q:

The LCM of

 A) 25x3y5 B) 15x3y5 C) 12x3y3 D) 60x3y5

Explanation:

1 635
Q:

The LCM of the three numbers 45, 25 and 35 is:

 A) 1400 B) 1225 C) 1575 D) 1800

Explanation:

1 1409
Q:

What is the HCF of 132 and 176?

 A) 33 B) 66 C) 44 D) 22

Explanation:

1 681
Q:

The HCF of 96, 156 and 60 is

 A) 3 B) 48 C) 12 D) 4

Explanation:

2 269
Q:

The LCM of 60 and 54 is

 A) 6 × 5 × 9 B) 6 × 10 × 3 C) 6 × 10 × 9 D) 60 × 54

Explanation:

2 1366
Q:

The LCM of 145 and 87 is:

 A) 580 B) 725 C) 290 D) 435

Explanation:

2 1954
Q:

Find the HCF of 48, 92 and 140.

 A) 8 B) 6 C) 4 D) 3