Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 413 · 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.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
5. 5.🧩 Saanvi is 12 years old. Kabir is 9 years older than Saanvi. How old is Kabir? (a) 21 (b) not enough info (c) 22 (d) 9
6. 6.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
7. 7.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
8. 8.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
11. 11.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
12. 12.🧩 Aarav bought 2 markers and a cap for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) ₹150 (c) ₹148 (d) not enough info
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
14. 14.🧩 Vihaan is 7 years old. Aarav is 7 years older than Vihaan. How old is Aarav? (a) 14 (b) 7 (c) 15 (d) not enough info
15. 15.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
16. 16.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
17. 17.🧩 Tara bought 3 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹35 (c) ₹30 (d) not enough info
18. 18.🧩 Ishaan bought 2 notebooks and a bag for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹90 (b) ₹180 (c) ₹178 (d) not enough info
19. 19.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
22. 22.🧩 Nisha is 10 years old. Meera is older than Nisha. How old is Meera? (a) 11 (b) 12 (c) not enough info (d) 15
23. 23.🧩 A box has 3 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 11 (b) 24 (c) 32 (d) not enough info
24. 24.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 5 (b) 50 (c) not enough info (d) 10
25. 25.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) 14 (c) 70 (d) not enough info
26. 26.🧩 Ananya bought 6 kites for ₹270 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) not enough info (c) ₹270 (d) ₹45
27. 27.🧩 Rohan bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹55 (c) ₹250 (d) not enough info
28. 28.🧩 Aarav is 8 years old. Tara is 4 years older than Aarav. How old is Tara? (a) not enough info (b) 4 (c) 13 (d) 12
29. 29.🧩 Tara bought 3 markers and a lunch box for ₹120 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹120 (d) ₹117
30. 30.🧩 A box has 8 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 14 (b) not enough info (c) 54 (d) 48
31. 31.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
32. 32.🧩 Saanvi is 11 years old. Meera is 6 years older than Saanvi. How old is Meera? (a) 18 (b) 6 (c) not enough info (d) 17
33. 33.🧩 Vihaan bought 2 markers and a cap for ₹160 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹80 (c) ₹160 (d) ₹158
34. 34.🧩 Nisha is 7 years old. Aarav is older than Nisha. How old is Aarav? (a) 8 (b) 9 (c) 12 (d) not enough info
35. 35.🧩 Ishaan is 7 years old. Nisha is 7 years older than Ishaan. How old is Nisha? (a) not enough info (b) 15 (c) 14 (d) 7
36. 36.🧩 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
37. 37.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
40. 40.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 10 PM

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