alleryWhat is 35² without direct multiplication?
A725
B1125
C1225
D1325
Answer & Solution
Correct answer: C. 1225
For any number a5: (a5)² = a(a+1) hundreds + 25. With a = 3: 3 × 4 = 12, so 35² = 1200 + 25 = 1225.
Keep practising Mensuration
Browse all Mensuration questions for GRE, or explore more Mathematics topics.
Related questions
A square garden has area 2025 m². What is its side?Two square fields have areas in the ratio 16 : 9. The ratio of their PERIMETERS is:How many digits will be in the square root of a perfect square with EXACTLY 8 digits?What is the units digit of (1234)²?Compute the square root of 12.96 (a decimal).Compute 105² without direct multiplication:What is the smallest natural number by which 1620 must be DIVIDED so that the quotient is What is the smallest natural number by which 180 must be MULTIPLIED so that the product be