21.
Find a positive number which when increased by
17 is equal to 50 times the reciprocal of the number.
a)
3
b)
5
c)
7
d)
9
22.
The sum of a positive number and its
reciprocal is thrice the difference of the number and its reciprocal. The
number is:
a)
b)
c)
d)
23.
The product of two natural numbers is 17.
Then, the sum of the reciprocals of their squares is:
a)
1/289
b)
289 / 290
c)
290 / 289
d)
289
24.
If 2 ½ is added to a number and the sum
multiplied by 4 ½ and 3 is added to the product and then dividing the sum by 1
1/15, the quotient becomes 25. What is the number?
a)
2 1/2
b)
3 ½
c)
4 ½
d)
5 ½
25.
Three numbers are in the ration 4:5:6f and
their average is 25. The largest number is:
a)
30
b)
32
c)
36
d)
42
ANSWERS
