56.21 +2.36+5.41 —21.4+1.5=?
A). 34.08
B). 44.08
C). 54.08
D). 64.08
1. What least value should be added to 1812 to make it divisible by 7, 11 and 14?
4. Greatest number of 4 digits which is divisible by each one of 12, 18, 21 and 28 is
5. If x is a prime number, LCM of x and its successive number would be
6. What is the sum of all the composite numbers up to 20?
7. If the difference between a number and its 2/5 is 240, find the number.
9. Calculate the total number of prime factors in the expression (4)11 × (5)5 × (3)2 × (13)2.
10. If \(x = \sqrt {\frac{{\sqrt 5 + 1}}{{\sqrt 5 - 1}}}\), then the value of 5x2 – 5x – 1 is