The sum of all digits of a number is 54. Which of the following will definitely divide the number?
8
9
6
5
A number is divisible by 5. Which can be the digit at the ones place of the number?
2
8
0
6
Which of the following are co-prime numbers?
4 and 8
3 and 6
3 and 4
2 and 6
The product of two numbers is 440. Their LCM is 22. What is their LCM?
440 + 22 = 462
440 – 22 = 418
440 × 22 = 9,680
440 ÷ 22 = 20
Observe and Answer
Observe the given pictures and type the HCF of 25 and 80.
Observe the given pictures. Are 21 and 32 co-prime numbers?
Observe the given pictures and type the LCM of 15 and 20.
Observe the given picture and type the LCM of 48, 64 and 72.
Observe the given pictures and type the HCF of 24, 36 and 42.
Typing
Type the HCF of 24, 60 and 140.
Type the LCM of 64 and 42.
Are 24 and 39 co-prime numbers?
The LCM of 25 and 65 is 325. Type the HCF of 25 and 65.
Three strings of lengths 240 cm, 318 cm and 426 cm are to be cut into equal lengths. Type the greatest possible length of each piece.
Two lighthouses flash their lights every 20 seconds and 30 seconds respectively. Given that they together flashed the lights at 7 p.m., type the time when they will next flash the lights together.
