| 01 | L.C.M of two numbers | = | Product of numbers / Their H.C.F |
| 02 | H.C.F of fraction | = | H.C.F of numerators / L.C.M of denominators |
| 03 | L.C.M of fractions | = | L.C.M of numerators / H.C.F of denominators |
| 04 | Average | = | Sum of all quantities / Number of quantities |
| 05 | Speed | = | Distance / Time |
| 06 | Profit | = | Selling Price – Cost Price |
| 07 | Loss | = | Cost Price – Selling Price |
| 08 | Gain % | = | Gain x 100 / Cost Price |
| 09 | Loss % | = | Loss x 100 / Cost Price |
| 10 | Simple Interest | = | Principal x Rate x Time / 100 |
| 11 | Principal | = | 100 x Simple Interest / Rate x Time |
| 12 | Rate | = | 100 x Simple Interest / Principal x Time |
| 13 | Time | = | 100 x Simple Interest / Principal x Rate |
| 14 | Area of Rectangle | = | Length x Breadth |
| 15 | Area of Square | = | (Length of side)2 |
| 16 | Area of four wall of a room | = | 2 (Length + Breadth) x Height |
| 17 | Circumference of a circle | = | 2¶r |
| 18 | Area of circle | = | ¶r2 |
| 19 | Surface of a cube | = | 2 (lb +b.h+lh) |
| 20 | Volume of cube | = | (l)2 |
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