Find the lowest common multiple of 24, 36, and 40:
- (A) 120
- (B) 240
- (C) 360
- (D) 480
The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4, and 3 is:
- (A) 3
- (B) 13
- (C) 23
- (D) 33
Reduce128352 /238368 to its lowest terms.
- (A) 3/4
- (B) 5/13
- (C) 7/13
- (D) 9/13
The least number which when divided by 5, 6, 7, and 8 leaves a remainder of 3, but when divided by 9 leaves no remainder, is:
- (A) 1677
- (B) 1683
- (C) 2523
- (D) 3367
A, B, and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds, and C in 198 seconds. After what time will they again be at the starting point?
- (A) 25 minutes and 18 seconds
- (B) 42 minutes and 36 seconds
- (C) 45 minutes
- (D) 46 minutes and 12 seconds
The H.C.F. of two numbers is 11 and their LCM is 7700. If one of the numbers is 275, then the other number is:
- (A) 279
- (B) 283
- (C) 308
- (D) 318
The least number which when doubled will be exactly divisible by 12, 18, 24, and 30 is:
- (A) 630
- (B) 1260
- (C) 2520
- (D) 196
The ratio of two numbers is 3:4 and their H.C.F. is 4. Their L.C.M. is:
- (A) 48
- (B) 24
- (C) 12
- (D) 16
The smallest number which, when diminished by 7, is divisible by 12, 16, 18, 21, and 28 is:
- (A) 1008
- (B) 1032
- (C) 1022
- (D) 1015
252 can be expressed as a product of primes as:
- (A) 2 × 2 × 3 × 3 × 7
- (B) 2 × 2 × 2 × 3 × 7
- (C) 3 × 3 × 3 × 3 × 7
- (D) 2 × 3 × 3 × 3 × 7