Question
Anita spends 18% of her monthly income on rent and 70% of
the rest on household expenditure. If she saves Rs. 1,890, then find her monthly income.Solution
ATQ,
Let the monthly income of Anita be Rs. 100b.
Money spent on rent = 18% of 100b = (0.18) × 100b = Rs. 18b
Remaining money = 100b – 18b = Rs. 82b
Money spent on household expenditure = 70% of 82b = (0.70) × 82 = Rs. 57.4b
Savings of Anita = 82b – 57.4b = Rs. 24.6b
So, 24.6b = 1,890
Or, ‘b’ = 76.8
Therefore, monthly income = Rs.7,680
If √3n 729, then the value of n is equal to:

Simplify the following expressions and choose the correct option.
18² + (27 ÷ 3) × 11 − 250 = ?
√144 × √121 + 25% of 600 = ? + 256
Simplify the following expression:-
What will come in the place of question mark (?) in the given expression?
? × 18 + 3072 ÷ 24 = 20% of 1900Â
Simplify the following expression:
  (525 +175) ² - (525 – 175) ² / (525 × 175)
? = 6.25% of 240 + 25 2 + 17 2 – 16 × 17
(8.4 × 6.5 ×2.52 )/(5.04 ×3.25 ×2.1) = ?
Simplify: 3/4 of 2½ + 2/3 of 1½