Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 410 · 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.🧩 Aarav is 12 years old. Tara is older than Aarav. How old is Tara? (a) 14 (b) 17 (c) 13 (d) not enough info
2. 2.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
7. 7.🧩 A box has 6 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 48 (c) 56 (d) 14
8. 8.🥭 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) yes, it is certain (d) no, check more
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Diya bought 3 mangoes and a water bottle for ₹200 in all. Each mango cost the same. What did one mango cost? (a) ₹197 (b) ₹200 (c) not enough info (d) ₹66
11. 11.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
12. 12.🧩 Arjun is 8 years old. Meera is 9 years older than Arjun. How old is Meera? (a) 17 (b) not enough info (c) 9 (d) 18
13. 13.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
14. 14.🧩 Ishaan bought 3 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹75
15. 15.🧩 Meera bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) not enough info (c) ₹150 (d) ₹50
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
17. 17.🧩 A box has 7 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 32 (b) not enough info (c) 11 (d) 28
18. 18.🧩 Nisha is 8 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 10 (b) 9 (c) not enough info (d) 13
19. 19.🧩 Ishaan bought 5 notebooks and a lunch box for ₹350 in all. Each notebook cost the same. What did one notebook cost? (a) ₹350 (b) not enough info (c) ₹345 (d) ₹70
20. 20.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
21. 21.🧩 A box has 8 rows of guavas, with 6 in each row. How many guavas are in the box? (a) not enough info (b) 14 (c) 48 (d) 54
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
23. 23.🧩 Nisha bought 3 kites and a bag for ₹155 in all. Each kite cost the same. What did one kite cost? (a) ₹51 (b) ₹155 (c) not enough info (d) ₹152
24. 24.🧩 Kabir is 12 years old. Meera is older than Kabir. How old is Meera? (a) 13 (b) 14 (c) 17 (d) not enough info
25. 25.🧩 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
26. 26.🧩 Rohan bought 3 mangoes and a bag for ₹155 in all. Each mango cost the same. What did one mango cost? (a) ₹51 (b) ₹152 (c) ₹155 (d) not enough info
27. 27.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
29. 29.🧩 Vihaan is 7 years old. Tara is 3 years older than Vihaan. How old is Tara? (a) not enough info (b) 11 (c) 3 (d) 10
30. 30.🧩 Ananya is 9 years old. Ishaan is older than Ananya. How old is Ishaan? (a) not enough info (b) 10 (c) 14 (d) 11
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
33. 33.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
34. 34.🧩 Diya bought 2 pens and a bag for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) ₹75 (c) ₹148 (d) not enough info
35. 35.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 90 (b) 9 (c) not enough info (d) 18
36. 36.🧩 Kabir bought 6 notebooks and a lunch box for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹134 (b) not enough info (c) ₹140 (d) ₹23
37. 37.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
38. 38.🧩 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) 8 (d) 20
39. 39.🧩 Ishaan is 9 years old. Diya is older than Ishaan. How old is Diya? (a) 11 (b) not enough info (c) 14 (d) 10
40. 40.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

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