Find the odd one out.
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Find the area of a right-angled triangle whose base is 12 cm and hypotenuse is 13cm.
Height of the triangle = 132-122=25 = 5 cm.
Its area =12*base*height= 12*12*5= 30cm2.
A wheel makes 1000 revolutions in covering a distance of 88 km. Find the radius of the wheel.
Distance covered in one revolution = 88×10001000= 88m.
2πR2=88 ⇒2×227×R=88 ⇒R=88×744
In the following question, select the odd letter/letters from the given alternatives.
At what time between 3 and 4 o’clock will the minute hand and the hour hand are on the same straight line but facing opposite directions ?
On straight line means 180 degree angle.180 = 11/2 min – 30 hrs180 = 11/2 m – 30 × 3180 = 11/2 m – 90(180 + 90) 2 = 11 mm = 540/11 = 49 1/11 minutes.
Find the next number in the series 141,137,146,130,155,119,...
The pattern is -4, +9,-16, +25, -36
The next number=119+49=168
David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics,Physics, Chemistry and Biology What are his average marks ?
Average = (76 + 65 + 82 + 67 + 85 )/ 5 = 375/5 = 75.
A and B invests Rs.8000 and Rs.9000 in a business. After 4 months, A withdraws half of his capital and 2 months later, B withdraws one-third of his capital. In what ratio should they share the profits at the end of the year ?
A : B(8000x4)+(4000x8) : (9000x6)+(6000x6) 64000 : 90000=> 32 : 45
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