Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 645 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 5 PM
2. 2.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
3. 3.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
4. 4.🧩 Ishaan bought 6 notebooks and a bag for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) ₹320 (b) not enough info (c) ₹314 (d) ₹53
5. 5.🧩 Tara bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) not enough info (c) ₹20 (d) ₹15
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
7. 7.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
8. 8.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
10. 10.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
11. 11.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 7 (c) 14 (d) 70
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Meera is 12 years old. Rohan is 7 years older than Meera. How old is Rohan? (a) 20 (b) not enough info (c) 19 (d) 7
17. 17.🧩 Arjun bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹165 (c) ₹60 (d) ₹55
18. 18.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
19. 19.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 64 (b) 16 (c) 72 (d) not enough info
20. 20.🧩 Meera is 9 years old. Kabir is older than Meera. How old is Kabir? (a) not enough info (b) 11 (c) 14 (d) 10
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
22. 22.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
24. 24.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) not enough info (b) 3 PM (c) 6 PM (d) 7 PM
25. 25.🧩 Aarav is 7 years old. Meera is older than Aarav. How old is Meera? (a) 12 (b) not enough info (c) 8 (d) 9
26. 26.🧩 Kabir is 10 years old. Meera is older than Kabir. How old is Meera? (a) 12 (b) not enough info (c) 11 (d) 15
27. 27.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 20 (b) 8 (c) 16 (d) not enough info
28. 28.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
29. 29.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Diya bought 6 markers and a lunch box for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹140 (b) ₹134 (c) ₹23 (d) not enough info
31. 31.🧩 Diya is 11 years old. Meera is older than Diya. How old is Meera? (a) not enough info (b) 16 (c) 13 (d) 12
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 5 PM (d) 6 PM
33. 33.🧩 Vihaan bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹125 (c) not enough info (d) ₹30
34. 34.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Ananya is 6 years old. Aarav is 5 years older than Ananya. How old is Aarav? (a) not enough info (b) 5 (c) 12 (d) 11
36. 36.🧩 Diya bought 6 kites for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹45 (c) ₹240 (d) not enough info
37. 37.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
38. 38.🧩 Rohan bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹240 (c) ₹40 (d) not enough info
39. 39.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
40. 40.🧩 Ananya bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹90 (c) not enough info (d) ₹45

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