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Practice Time 6D

1. If 7 is subtracted from four times a number, the result is 29. Find the number.

2. Nine times a number is 16 more than the number. Find the number.
3. The sum of thrice a number and 18 is 39. Find the number.
4. If the sum of two consecutive multiples of 5 is 75, then find the multiples.

5. The length of a rectangle is twice its breadth. If its perimeter is 48 cm, find the length and the
breadth of the rectangle.

6. In a class of 48 students, the number of girls is one-third of the number of boys. Find the number
of boys in the class.

7. One-fifth of a number added to half of it which is equal to 9 less than the number. Find the number.
8. Thrice a number decreased by 5 exceeds twice the number by 1. Find the number.
9. If 45 is added to half a number, the result is triple the number. Find the number.

10. Rohan’s father’s age is 9 years more than 3 times Rohan’s age. If his father’s age is 54 years, then find
Rohan’s age.

11. The denominator of a fraction is 3 times of its numerator. If 4 is subtracted from both its numerator
and denominator, it becomes 1 . Find the fraction.
5
12. Ishita has a bag which contains 1-rupee, 2-rupee and 5-rupee coins whose value is ₹780. If the number
of 1-rupee coins is twice that of 2-rupees coins and 2-rupees coins is twice that of 5-rupees coins,
find the number of each type of coins.

maths fun
The answer to this riddle is hidden in the equation given below:
If i + 69 = 70, then i = ? If 8u = 6u + 8, then u =?
If 4a = –5a + 45, then a = ? if 4q + 5 = 17, then q =?
1
If –5t – 60 = – 70, then t = ? If s + 98 = 100, then s =?
4
5
If p + 9 = 24, then p =_____?
3
If 3c = c +12, then c =_____?
If 3 (k + 1) = 24, then k =_____?
For riddle answer: substitute the number for the letter it equals.

12 34 56 78 49

Brain Sizzlers

A number consists of two digits. The digit in the tens place is twice the digit in ones place. If 27 is subtracted
from the number, the digits are reversed. Find the number.

141 Simple Equations