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If 13 + 23 + ………. + 103 = 3025, then 4 + 32 + 108 + …….. + 4000 is equal to :
In two alloys the ratios of copper to tin are 3 : 4 and 1 : 6 respectively. If 7 kg of the first alloy and 21 kg of the second alloy are mixed together to form a new alloy, then what will be the ratio of copper to tin in the new alloy?
Two articles are purchased at Rs. 770. Both are sold at same selling prices, however from one article 20% profit is made while from another there is a loss of 10%. Find the overall profit or loss?
What is that least number that must be added to the product 684 × 686 to make it a perfect square?
A glass containing water has two holes. The first hole alone empties the glass in 9 minutes and the second hole alone empties the glass in 3 minutes. If water leaks out at a constant rate, how many minutes will it take if both the holes together empty the glass?
Find the unit digit of, (1!)99 + (2!)98 + (3!)97 + ………………+ (99!)1
If cos θ + sec θ = 2, the value of cos6 θ + sec6 θ is
The greatest number among is?
The radius of two concentric circles are 9 cm and 15 cm. If the chord of the greater circle be a tangent to the smaller circle, then the length of that chord is
The length and breadth of a square are increased by 30% and 20% respectively. The area of the rectangle so formed exceeds the area of the square by
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Mar 6SSC & Railway