Sent from my iPhone
Thursday, July 23, 2026
P5 order of operations
Most people get this wrong on the first try.
72 ÷ (8 + 4) × 6 − 9
____
Why is it so?
One reason is based on the misconception that multiplication has higher ranking than division.
Another is when people have only a partial understanding of order of operations. While they know that / and x have the same rank, and ought to operate from left to right, they are nevertheless affected by a phenomenon I coined as “the luring of numbers”: given that 12x6=72, and 72/72 will “conveniently” yield 1 for the result of the first 4 numbers (in turn resulting in a wrong final answer of -8) , when it ought to be 36 (where final answer should be 27)
Wednesday, July 22, 2026
Tuesday, July 21, 2026
Monday, July 20, 2026
Sec3 Sec4 Geometry (cyclic quad and angle at centre = 2x angle at circumference)
____ my solution
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P6 circles
_______ my solution 5r = 66-3x2 = 60 r =60/5=12 (a) Breadth of garden= (2+12)x2=28 m (b) area of path = 2x14 + 5 x 1/4 x 3.14 x (14x14 - 12x12) = 28 + 5x40.82 = 232.1 m2
Saturday, July 18, 2026
Friday, July 17, 2026
Thursday, July 16, 2026
Numbers in relation to our lifetime ( Significance of numbers in our lives )
How many moments (seconds) have we lived? 🤔
For a centenarian, his/her heart would have beaten 3 153 600 000 times (read as "That number is three billion, one hundred fifty-three million, six hundred thousand.) ie. 3 billion times in 1 lifetime.
Internet speed is in the range of 500 Mbps (500 000 000 bits per second) or 10 Gbps (10 000 000 000 bits per second)
Wednesday, July 15, 2026
Tuesday, July 14, 2026
Monday, July 13, 2026
Sunday, July 12, 2026
Saturday, July 11, 2026
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