If A = 2n + 13 and B = n + 7, where n is a natural number, then HCF of A and B is

The LCM of 5, 8, 12 and 20 will not be a multiple of

Three runners running around a circular track can complete one revolution in 2, 3 and 4 hrs, respectively. They will meet again at the starting point after

The pairs of natural numbers having least common multiple 78 and greatest common divisor 13 are

Two natural numbers have their sum as 85 and LCM as 102. Which of the following are the two numbers?

Four bells toll together at 9.00 am. They toll after 7, 8, 11 and 12 seconds, respectively. How many times will they toll together again in the next 3 hours?

Two natural numbers with difference 66 and LCM 360 are

The LCM of 2.5, 0.5 and 0.175 is

What is the smallest number which when increased by 6 becomes divisible by 36, 63 and 108?

The HCF and LCM of two numbers are 33 and 264, respectively. When the first number is completely divided by 2, the quotient is 33. The other number is

Two alarm clocks beep at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12.00 pm noon, at what time will they beep again?

Two friends were discussing their marks in an examination. While doing so, they realised that both the numbers had the same prime factors, although one got a score which had two more factors than the other. If their marks are represented by one of the option as given below, which option is correct?

Two equilateral triangles have sides of lengths 34 cm and 85 cm. The greatest length of tape that can measure the sides of both of them exactly is

The HCF of 2472, 1284 and a third number N is 12. If their LCM is 2³ x 3² x 5 x 103 x 107, then the number N is

There are three pieces of timber of lengths 42 m, 49 m and 63 m. These have to be divided into planks of the same length. The least possible number of planks is