16. The age of Jay two years ago was x years, his age 3 years later
will be
years.
17. If y-7=7, then the value of y is
18. If 8, x, 48 and 18 are in proportion then the value of x is
19. A team won 7 games and lost 1. The ratio of the games won to the
total games played is
20. A square pyramid has
corners.
Answers
Answer:
i) Writing the ratios as fractions, we have
3 : 4 = 34 and 9 : 16 = 916
Now, LCM of 4 and 16 = 16.
Making the denominator of each fraction = 16, we have
34 = 3 × 44 × 4 = 1216 and the other fraction = 916
Of 1216 and 916, clearly 1216>916.
Therefore, 34>916.
(ii) Writing the ratios as fractions, we have
15 : 16 = 1516 and 24 : 25 = 2425
Now, LCM of 16 and 25 = 400.
Making the denominator of each fraction = 400, we have
1516 = 15 × 2516 × 25= 375400 and the other fraction = 24 × 1625 × 16= 384400
Clearly, 384 > 375. So, 384400 > 375400.
Therefore, 2425>1516.
(iii) Writing the ratios as fractions, we have
4 : 7 = 47 and 5 : 8 = 58
Now, LCM of 7 and 8 = 56.
Making the denominator of each fraction = 56, we have
4× 87 × 8= 3256 and the other fraction = 5 × 78 × 7= 3556
Clearly, 36 > 32. So, 3556 > 3256.
Therefore, 58>47.
17.
- y-7 = 7
- y = 7+7 = 14
- Value of y = 14
19.
- 7:8 ratio