Tips and Ticks Time and Work Problems - Shortcut Tricks and Formulas


Tips and Ticks Time and Work Problems - Shortcut Tricks and Formulas

Problems Type 1:

A can finish work in X days.

B can finish work in Y days.


Both can finish in Z days = (X*Y) / (X+Y).


Problems Type 2:

Both A and B together can do work in T days.

A can do this work in X days.


then, B can do it in Y days = (X*T) / (X-T)


Problems Type 3:

A can finish work in X days.

B can finish work in Y days.

C can finish work in Z days.


Together they can do work in T days = (X*Y*Z)/ [(X*Y)+(Y*Z)+(X*Z)]


Problems Type 4:

A can finish work in X days.

B can finish work in Y days.


A*X = B*Y

Y = (A*X) / B


Problems Type 5:

A can finish work in X days.

B can finish work in Y days.


A left work after P days then B need to work Q days

Q = [(X - P) / X ] * Y

Problems Type 6:

M1 person can do W1 work in D1 days and H1 hours

M2 person can do W2 work in D2 days and H2 hours


M1D1H1 = M2D2H2

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Important Maths Formulas ( പ്രധാനപ്പെട്ട ഗണിത സൂത്രവാക്യങ്ങൾ )

Important Maths Formulas .

(a ± b) 2 = a 2 ± 2ab + b 2 .


(a + b + c) 2 = a 2 + b 2 + c 2 + 2(ab + bc + ca).


(a + b + c + d) 2 = a 2 + b 2 + c 2 + d 2 + 2(ab + ac + ad + bc + bd + cd) .


Geometry formulas .

Perimeter ( ചുറ്റളവ് ) .


Perimeter of a square: P=4a.

    a: length of one side.


Perimeter of a rectangle: P=2(l+w).

    l: length.

    w: width.


Perimeter of a triangle: P=a+b+c.

    a, b, and c: lengths of the 3 sides.


Area ( വിസ്തീര്‍ണ്ണം ) .
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BODMAS Rule

BODMAS is an acronym and it stands for Bracket, Of, Division, Multiplication, Addition and Subtraction. .

This explains the order of operations to solve an expression. According to Bodmas rule, if an expression contains brackets ((), {}, []) we have to first solve/simplify the bracket followed by of (powers and roots etc.), then division , multiplication , addition and subtraction from left to right. .

Example :.

7 + (6 × 52 + 3) =   7 + (6 × 25 + 3).

7 + (150 + 3).

7 + (153).

7 + 153 .

Ans: 160. .

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Trick to Remember SAARC Member Countries

Code: MBBS PAIN.


M: Malideep.

B: Bhutan.

B: Bengladesh.

S: Srilanka.

P: Pakistan.

A: Afganistan.

I: India.

N: Nepal.

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