Question
The ratio of tea cups to coffee cups in a canteen is
6:5. If 18 tea cups are broken and 12 new coffee cups are added, the count of both becomes equal. Find the original number of coffee cups.Solution
ATQ,
Let the number of tea and coffee cups be '6n' and '5n', respectively.
So, 6n - 18 = 5n + 12
Or, 'n' = 30
Therefore, number of coffee cups = 30 × 5 = 150
12.5% of (100 + ?) = 40
2/9 of 5/8 of 3/25 of ? = 40
24 × √? + 4008 ÷ 24 = 40% of 200 + 327
7(1/2) – 3(5/6) = ? − 2(7/12)
280 ÷ 14 + 11 × 12 – 15 × 6 = ?
1550 ÷ 62 + 54.6 x 36 = (? x 10) + (28.5 x 40)
25% of 1000 + 10% of 150 – 22 × ? = 45
√ 729 × 5 – 220 % of 15 + ? = 120% of 160
What will come in the place of question mark (?) in the given expression?
(40% of ? × 43 ) – 232 = 751
180 % of 45 + √144 × 8 = ?2 + 80 % of 70