Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 773 · 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.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
2. 2.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
3. 3.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
4. 4.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) 6 PM (d) not enough info
5. 5.🧩 Kabir is 8 years old. Nisha is 4 years older than Kabir. How old is Nisha? (a) 13 (b) 4 (c) 12 (d) not enough info
6. 6.🧩 Vihaan is 11 years old. Aarav is 6 years older than Vihaan. How old is Aarav? (a) 6 (b) 17 (c) 18 (d) not enough info
7. 7.🧩 Meera is 11 years old. Vihaan is 3 years older than Meera. How old is Vihaan? (a) 15 (b) not enough info (c) 14 (d) 3
8. 8.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Nisha bought 2 markers and a lunch box for ₹90 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹45 (c) ₹90 (d) ₹88
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
12. 12.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 24 (c) 20 (d) not enough info
13. 13.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 7 PM (d) not enough info
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Arjun bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹125 (b) ₹30 (c) ₹25 (d) not enough info
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
17. 17.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
18. 18.🧩 Diya bought 2 pens for ₹20 in all. Each pen cost the same. What did one pen cost? (a) ₹10 (b) ₹15 (c) ₹20 (d) not enough info
19. 19.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
20. 20.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
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) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
23. 23.🧩 Arjun is 11 years old. Saanvi is older than Arjun. How old is Saanvi? (a) 13 (b) not enough info (c) 16 (d) 12
24. 24.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Arjun bought 4 markers and a lunch box for ₹270 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹270 (c) ₹266 (d) ₹67
28. 28.🧩 Diya bought 2 notebooks and a water bottle for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹158 (b) ₹80 (c) ₹160 (d) not enough info
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
31. 31.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) not enough info (b) 15 (c) 20 (d) 8
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
35. 35.🧩 Rohan is 12 years old. Ananya is 5 years older than Rohan. How old is Ananya? (a) 5 (b) not enough info (c) 18 (d) 17
36. 36.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) 8 (c) not enough info (d) 15
37. 37.🧩 Rohan bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) not enough info (c) ₹110 (d) ₹55
38. 38.🧩 A box has 7 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 35 (b) 40 (c) 12 (d) not enough info
39. 39.🧩 Kabir bought 3 pens for ₹135 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹135
40. 40.🧩 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

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