Instead of solving 29 × 7 directly, break 29 as:

(30 – 1) × 7 = (30 × 7) – (1 × 7) = 210 – 7 = 203

✨ 2. Learn to Square Numbers Ending in 5 Quickly

A shortcut to square numbers ending in 5 (like 35, 65, 85):

Example: 65²

Take the first digit(s): 6
Multiply it by its next number: 6 × 7 = 42
Now add “25” at the end → 65² = 4225