(√6 + 1)² = ? + 2√6
A). 5
B). 6
C). 7
D). 8
7
? = (√6 + 1)² - 2√6
= (√6)² + 2 x √6 + 1 + 1² - 2√6
= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
2. The difference between a number and its three-fifth is 50. What is the number?
3. What is the difference between the largest and the smallest number written with 7, 7, 0, 7?
5. Two-third of a positive number and 25/216 of its reciprocal are equal. The number is:
6. What is the HCF 34 × 55 and 32 × 56?
9. What is the minimum number to be subtracted from 6321, which makes it completely divisible by 14?