If all the digits of the number 9637866458 are arranged in decreasing order, then sum of 5th and 6th digits (from the left end) of the number thus formed, is ____.
9 6 3 7 8 6 6 4 5 8 3 4 5 6 6 6 7 8 8 9 Required sum = 6 + 6 = 12
If x - 1/x = 9, then the value of x² + 1/ x² is:
390/? = √256 + 3.5
323 × 15 + (?)² = 4989
((67)32 × (67)-18/ ? = (67)⁸
19 × ? = 361 ÷ 19
25.6% of 250 + √? = 119
4387897 – 3286871 – 51926 = ?
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