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X-rays were discovered by WC Roentgen in 1895 and he was later awarded with Nobel Prize in 1901. He named that new unknown type of radiation as X-rays. X-rays are the second most energetic radiations in the Electromagnetic Spectrum following Gamma rays. • Therefore these are very shortwave and high-energy EM radiations (traveling with the speed of light). - X-rays are widely used in medical diagnosis and Astronomy.
1365 ÷ 15 + (? ÷ 5) = 62 × 3.5
{17 + √2601}/(? + 2) = 17
25% of 400 + 3 × 102 = ?2
690 ÷ (75% of 460) = ? ÷ (50% of 160)
What will come in place of the question mark (?) in the following questions?
35% of 240 – 6 2 = ? 2 – √256
808 ÷ (128)1/7 + 482 = 4 × ? + 846
What will come in the place of question mark (?) in the given expression?
(40/25) X 80 - ? = 45% of 300 - 55
√121 + √961− √289 =?2
22 – 15 + 20 × 18 ÷ 6 – 34 = ?