Find the L.C.M. of the following numbers in which one number is the factor of the other. (a) 5, 20


2

403

April 3, 2019

Find the L.C.M. of the following numbers: (a) 9 and 4


2

659

April 3, 2019

Find the smallest four digit number which is divisible by 18, 24 and 32


2

388

April 3, 2019

Find the least number which when divided by 6, 15 and 18 leave remainder 5 in each case


2

698

April 3, 2019

Three tankers contain 403 liters, 434 liters and 465 liters of diesel respectively


2

206

April 3, 2019

The traffic lights at three different road crossings change after every 48 seconds, 72 seconds


2

199

April 3, 2019

Determine the largest 3digit number exactly divisible by 8, 10 and 12


2

357

April 3, 2019

Determine the smallest 3digit number which is exactly divisible by 6, 8 and 12


2

319

April 3, 2019

The length, breadth, and height of a room are 825 cm, 675 cm, and 450 cm, respectively


2

156

April 3, 2019

Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm, and 77 cm,


2

250

April 3, 2019

Renu purchases two bags of fertilizer of weights 75 kg and 69 kg


2

441

April 3, 2019

H. C.F. of coprime numbers 4 and 15 was found as follows factorization:


2

252

April 3, 2019

What is the H.C.F. of two consecutive : (a) numbers?


2

81

April 3, 2019

Find the HCF of the following numbers : (a) 18, 48


2

810

April 3, 2019

I am the smallest number, having four different prime factors. Can you find me?


2

199

April 3, 2019

18 is divisible by both 2 and 3. It is also divisible by 2 x 3 = 6. Similarly,


2

238

April 3, 2019

Determine if 25110 is divisible by 45


2

183

April 3, 2019

In which of the following expressions, prime factorisation has been done?


2

228

April 3, 2019

The sum of two consecutive odd numbers is divisible by 4. Verify this statement with the help of same examples


2

427

April 3, 2019

The product of three consecutive numbers is always divisible by 6


2

327

April 3, 2019

Find all the prime factors of 1729 and arrange them in ascending order


2

347

April 3, 2019

Write the smallest 5digit number and express it in the form of its prime factors


2

616

April 3, 2019

Write the greatest 4digit number and express it in terms of its prime factors


2

455

April 3, 2019

Which factors are not included in the prime factorisation of a composite number?


2

323

April 3, 2019

Here are two different factor trees for 60. Write the missing numbers


2

133

April 3, 2019

Which of the following statements are true? (a) If a number is divisible by 3, it must be divisible by 9


2

69

April 3, 2019

A number is divisible by 12. By what other numbers will that number be divisible?


2

280

April 3, 2019

A number is divisible by both 5 and 12. By which other number will that number be always divisible?


2

371

April 3, 2019

Which of the following numbers are coprime? (a) 18 and 35


2

357

April 3, 2019

Write all the numbers less than 100 which are corrimon multiples of 3 and 4


2

74

April 3, 2019
