11. What is the value of 
a. 43
b. 6.557
c. 43
d. ∞
12. Give: a * b = a + b + ab.
Find the value of 6 * 24.
a. 41
b. 42
c. 43
d. 44
13. Find the smallest number by which you can multiply 675 so that the resultant is a perfect cube.
a. 5
b. 6
c. 7
d. 8
14. Find the value of .0025 * 2.25 *.0001?
a. .00075
b. .0075
c. .075
d. None of these
15. Find the smallest number to divide 1470 to obtain a perfect square.
a. 5
b. 6
c. 15
d. 30
a. 43
b. 6.557
c. 43
d. ∞
Answer: c. 43
Explanation:
Let A =
∴ A2 = 43
∴ A2 = 43A
∴ A = 43
Tip:
12. Give: a * b = a + b + ab.
Find the value of 6 * 24.
a. 41
b. 42
c. 43
d. 44
Answer: b. 42
13. Find the smallest number by which you can multiply 675 so that the resultant is a perfect cube.
a. 5
b. 6
c. 7
d. 8
Answer: a. 5
14. Find the value of .0025 * 2.25 *.0001?
a. .00075
b. .0075
c. .075
d. None of these
Answer: d. None of these
15. Find the smallest number to divide 1470 to obtain a perfect square.
a. 5
b. 6
c. 15
d. 30
Answer: d. 30
