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Today we are going to learn another cool trick to multiply any number from 80 to 89 by 5 in seconds. Let us see the steps Step 1: Assume the base as 80 Step 2: Multiply the base by 5 Step 3:Multiply the unit place digit by 5 Step 4:Add the results obtained in step…

1. Information systems can assist managers by______ (4) (1) Providing information (2) Providing data on internal sources (3) Directing (4 )All of the above (5) None of these 2. Which among the following is a disadvantage of an EDI system? (3) (1) Speed (2) Errors (3) Expensive (4) Mismatch (5) None of these 3. In…

1. Grouping and processing all of a firm’s transactions at one time are called- (5) (1) A database management system (2) Batch processing (3) A real-time system (4) An on-line system (5) None of these 2………A printer is this kind of device- (3) (1) Input (2) Word processing (3) Word processing (4) Output (5) None…

Squaring In this simple trick we need to modify the equation and make the units digit zero. After all it is easy to multiply when units digit is zero. For example – Find square of 43 = (43+3) × (43-3) + (3×3) =(46×40) + 9 = (460×4) + 9 = 1840 + 9 = 1849…

PROBLEMS BASED ON AGES: If the current age is x, then age n years later/hence = x + n. If the current age is x, then age n years ago = x – n. If the sum of the ages of q persons is x, then n years later sum of the ages = x…