Ques:- One man want to build a wall .The length and breadth of the wall are 20 and 30 respectively. He needs 35 bricks for one square centimeter. How many bricks he need?
A. 21500
B. 30000
C. 21000
D. 20000
E. 25000
Ques:- The numbers 1, 3, 5, ….., 25 are multiplied together. The number of zeros at the right end of the product is
A. Four
B. Three
C. Two
D. Zero
Ques:- What was the first polyester fiber invented in 1941 called?
A. Terylene
B. Poplin
C. Terry cot
D. Rubia