Multiple choice

Find the approximate value of question mark (?) given in question below. (87.55% of 7198.74 –68.99% of 8939.88)×6=?2

  1. 20

  2. 24

  3. 28

  4. 32

  5. 36
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Approximate: 87.55% of 7198.74 ≈ 0.8755 × 7200 = 6304. 68.99% of 8939.88 ≈ 0.69 × 8940 = 6169. Difference = 6304 - 6169 = 6135. Then 6135 × 6 = 36810. ?² ≈ 36810, so ? ≈ √36810 ≈ 192. Checking: 28² = 784. This doesn't match. Let me reconsider: Maybe it's 87.55% of 7198.74 - 68.99% of 8939.88 = 6303.6 - 6167.3 = 136.3. Then 136.3 × 6 = 817.8. If this equals ?², then ? ≈ 28.6, closest to 28. ✓

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