Question
At what time between 8 and 9 o’clock will the
hands of a watch be together?Solution
To be together between 8 and 9o’clock, the minute hand has to gain 40 minutes spaces. 55 minutes spaces gained in 60 minutes. 40 minutes spaces are gained in (60/55×40) minutes or 43×7/11 minutes. Alternate method: θ = 11/2 M-30H or 0 = 11/2 M-30×8 or 240 = 11/2 M or M = 480/11= 43×7/11
Find the unit digit in (257)45 × (248)73.
A Student was asked to add 8 and subtract 5 from a number. By mistake, he added 5 and subtracted 8. If his answer is 11, what should be the correct answer?
- What is the remainder when
Which term of the arithmetic progression 88, 90, 92, 94... is 142?
15Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 60Â Â Â Â Â Â Â Â Â Â 540Â Â Â Â Â Â Â Â 8650
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