Question
Who is known for developing the first successful
incandescent light bulb?Solution
Thomas Edison is renowned for his invention of the first practical and commercially viable incandescent light bulb. Edison's innovation involved using a carbonized bamboo filament that could emit light for extended periods. This invention marked a significant advancement in lighting technology and had a profound impact on society by making indoor lighting more accessible and convenient.
31% of 3300 +659 = ?
? = 200.24 + 1077.97 – 14.992
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
49.99% of 639.99 + 159.98% of 49.99 = ?2
What approximate value should come in the place of (?) in the following questions?
...
(8160.42 ÷ 33.73) + 309.79 + ? = 30.2 * 81.84(0.89 3 + 1.64 3 +2.76 3 ) ÷ 5.89 = ?
?% of 549.83 – 18.05 × 31.96 = 44.94% of 479.84 – 13.98 × 33.13
?% of (150.31 ÷ 14.97 × 50.011) = 319.98
{44.78% of (11.67 × 54.78)} ÷ 2.65 = ? + 19.25
811.85 ÷ 28.05 + 462.16 – 23.06 × 17.95 = ?
